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https://www.readbyqxmd.com/read/28340419/photolytic-degradation-of-the-%C3%AE-blocker-nebivolol-in-aqueous-solution
#1
Alaa Salma, Holger V Lutze, Torsten C Schmidt, Jochen Tuerk
Nebivolol (NEB) is one of the top-sold prescription drugs belonging to the third generation of beta-blockers. However, so far, occurrence data in the environment are lacking. Within this study NEB has been found for the first time in effluent samples of wastewater treatment plants in Germany with an average concentration of 13 ng L(-1). Its photodegradation behavior in the environment and in technical processes is largely unknown. To fill this gap, three different UV treatment procedures (UV-C at 254 nm, UV-B at 312 nm and UV-A at 365 nm) were investigated in three different matrices: pure water, pure water in presence of the hydroxyl radical (OH) scavenger tert...
March 13, 2017: Water Research
https://www.readbyqxmd.com/read/28339776/effect-of-acute-millimeter-wave-exposure-on-dopamine-metabolism-of-ngf-treated-pc12-cells
#2
Alexis J Haas, Yann Le Page, Maxim Zhadobov, Ronan Sauleau, Yves Le Dréan, Christian Saligaut
Several forthcoming wireless telecommunication systems will use electromagnetic frequencies at millimeter waves (MMWs), and technologies developed around the 60-GHz band will soon know a widespread distribution. Free nerve endings within the skin have been suggested to be the targets of MMW therapy which has been used in the former Soviet Union. So far, no studies have assessed the impact of MMW exposure on neuronal metabolism. Here, we investigated the effects of a 24-h MMW exposure at 60.4 GHz, with an incident power density (IPD) of 5 mW/cm², on the dopaminergic turnover of NGF-treated PC12 cells...
February 24, 2017: Journal of Radiation Research
https://www.readbyqxmd.com/read/28339498/enhancement-of-osteogenic-differentiation-of-rat-adipose-tissue-derived-mesenchymal-stem-cells-by-zinc-sulphate-under-electromagnetic-field-via-the-pka-erk1-2-and-wnt-%C3%AE-catenin-signaling-pathways
#3
Ezzatollah Fathi, Raheleh Farahzadi
Zinc ion as an essential trace element and electromagnetic fields (EMFs) has been reported to be involved in the regulation of bone metabolism. The aim of this study was to elucidate the effects of zinc sulphate (ZnSO4) on the osteogenic differentiation of adipose tissue-derived mesenchymal stem cells (ADSCs) in the presence of EMF as a strategy in osteoporosis therapy. Alkaline phophatase (ALP) activity measurement, calcium assay and expression of several osteoblastic marker genes were examined to assess the effect of ZnSO4 on the osteogenic differentiation of ADSCs under EMF...
2017: PloS One
https://www.readbyqxmd.com/read/28339333/non-pharmacological-conservative-therapy-for-phantom-limb-pain-a-systematic-review-of-randomized-controlled-trials
#4
Sarah Batsford, Cormac G Ryan, Denis J Martin
The aim of this manuscript was to investigate the effectiveness of conservative therapy for phantom limb pain (PLP). In this systematic review, CINAHL, AMED, the Cochrane database of systematic reviews, PEDro, psychology and behavioral sciences collection, and MEDLINE were systematically searched for appropriate randomized controlled trials (RCTs). Selected papers were assessed for risk of bias, and evidence was graded using the GRADE approach. Twelve RCTs met initial inclusion/exclusion criteria, of which five were of sufficient quality for final inclusion...
March 2017: Physiotherapy Theory and Practice
https://www.readbyqxmd.com/read/28339260/dynamic-chiral-magnetic-effect-and-faraday-rotation-in-macroscopically-disordered-helical-metals
#5
J Ma, D A Pesin
We develop an effective medium theory for electromagnetic wave propagation through gapless nonuniform systems with a dynamic chiral magnetic effect. The theory allows us to calculate macroscopic-disorder-induced corrections to the values of optical, as well as chiral magnetic conductivities. In particular, we show that spatial fluctuations of the optical conductivity induce corrections to the effective value of the chiral magnetic conductivity. The absolute value of the effect varies strongly depending on the system parameters, but yields the leading frequency dependence of the polarization rotation and circular dichroism signals...
March 10, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28339184/mxene-ti3c2-an-effective-2d-light-to-heat-conversion-material
#6
Renyuan Li, Lianbin Zhang, Le Shi, Peng Wang
MXene, a new series of 2D material, has been steadily advancing its applications to a variety of fields, such as catalysis, supercapacitor, molecular separation, electromagnetic wave interference shielding. This work reports a carefully designed aqueous droplet light heating system along with a thorough mathematical procedure, which combined leads to a precise determination of internal light-to-heat conversion efficiency of a variety of nanomaterials. The internal light-to-heat conversion efficiency of MXene, more specifically Ti3C2, was measured to be 100%, indicating a perfect energy conversion...
March 24, 2017: ACS Nano
https://www.readbyqxmd.com/read/28335487/electromagnetic-vortex-based-radar-imaging-using-a-single-receiving-antenna-theory-and-experimental-results
#7
Tiezhu Yuan, Hongqiang Wang, Yongqiang Cheng, Yuliang Qin
Radar imaging based on electromagnetic vortex can achieve azimuth resolution without relative motion. The present paper investigates this imaging technique with the use of a single receiving antenna through theoretical analysis and experimental results. Compared with the use of multiple receiving antennas, the echoes from a single receiver cannot be used directly for image reconstruction using Fourier method. The reason is revealed by using the point spread function. An additional phase is compensated for each mode before imaging process based on the array parameters and the elevation of the targets...
March 19, 2017: Sensors
https://www.readbyqxmd.com/read/28335424/an-alternative-wearable-tracking-system-based-on-a-low-power-wide-area-network
#8
Raul Fernández-Garcia, Ignacio Gil
This work presents an alternative wearable tracking system based on a low-power wide area network. A complete GPS receiver was integrated with a textile substrate, and the latitude and longitude coordinates were sent to the cloud by means of the SIM-less SIGFOX network. To send the coordinates over SIGFOX protocol, a specific codification algorithm was used and a customized UHF antenna on jeans fabric was designed, simulated and tested. Moreover, to guarantee the compliance to international regulations for human body exposure to electromagnetic radiation, the electromagnetic specific absorption rate of this antenna was analyzed...
March 14, 2017: Sensors
https://www.readbyqxmd.com/read/28335415/time-modulated-arrays-from-their-origin-to-their-utilization-in-wireless-communication-systems
#9
REVIEW
Roberto Maneiro-Catoira, Julio Brégains, José A García-Naya, Luis Castedo
Time-modulated arrays (TMAs) are electromagnetic systems whose radiated power pattern is controlled by the application of variable-width periodical pulses to the individual elements. The nonlinear nature of the array operation causes the appearance of radiation patterns at the harmonic frequencies of such periodic pulses. The technique can be used for improving the side-lobe level (SLL) topology of the radiation pattern at the central frequency and/or to profitably exploit the harmonic patterns in order to supply smart antenna capabilities...
March 14, 2017: Sensors
https://www.readbyqxmd.com/read/28334532/an-ultrafast-switchable-terahertz-polarization-modulator-based-on-iii-v-semiconductor-nanowires
#10
Sarwat A Baig, Jessica L Boland, Djamshid A Damry, Hark Hoe Tan, Chennupati Jagadish, Hannah J Joyce, Michael B Johnston
Progress in the terahertz (THz) region of the electromagnetic spectrum is undergoing major advances, with advanced THz sources and detectors being developed at a rapid pace. Yet, ultrafast THz communication is still to be realised, owing to the lack of practical and effective THz modulators. Here, we present a novel ultrafast active THz polarization modulator based on GaAs semiconductor nanowires arranged in a wire-grid configuration. We utilise an optical pump--terahertz probe spectroscopy system and vary the polarization of the optical pump beam to demonstrate ultrafast THz modulation with a switching time of less than 5\,ps and a modulation depth of -8dB...
March 23, 2017: Nano Letters
https://www.readbyqxmd.com/read/28334331/alterations-of-immune-parameters-on-trichoplusia-ni-lepidoptera-noctuidae-larvae-exposed-to-extremely-low-frequency-electromagnetic-fields
#11
Jose A Valadez-Lira, Nahui O Medina-Chavez, Alonso A Orozco-Flores, J Antonio Heredia-Rojas, Abraham O Rodriguez-de la Fuente, Ricardo Gomez-Flores, Juan M Alcocer-Gonzalez, Patricia Tamez-Guerra
Worldwide mobile telephone and microwave use have resulted in an increasing presence of extremely low-frequency electromagnetic field radiations (ELF-EMFs) in ecosystems. ELF-EMFs have been associated with altered physiological processes that can adversely affect exposed organisms. In this study, Trichoplusia ni Hübner larvae were exposed for 24, 48, or 72 h to ELF-EMFs (60 Hz and 2.0 mT) to assess effects on immune response parameters and fertility. Trichoplusia ni life cycle and fertility were not affected by 24-h exposure...
March 6, 2017: Environmental Entomology
https://www.readbyqxmd.com/read/28332629/plasmonic-metamaterial-for-electromagnetically-induced-transparency-analogue-and-ultra-high-figure-of-merit-sensor
#12
Dong Wu, Yumin Liu, Li Yu, Zhongyuan Yu, Lei Chen, Ruifang Li, Rui Ma, Chang Liu, Jinqiannan Zhang, Han Ye
In this work, using finite-difference time-domain method, we propose and numerically demonstrate a novel way to achieve electromagnetically induced transparency (EIT) phenomenon in the reflection spectrum by stacking two different types of coupling effect among different elements of the designed metamaterial. Compared with the conventional EIT-like analogues coming from only one type of coupling effect between bright and dark meta-atoms on the same plane, to our knowledge the novel approach is the first to realize the optically active and precise control of the wavelength position of EIT-like phenomenon using optical metamaterials...
March 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28332487/observation-of-the-reversed-cherenkov-radiation
#13
Zhaoyun Duan, Xianfeng Tang, Zhanliang Wang, Yabin Zhang, Xiaodong Chen, Min Chen, Yubin Gong
Reversed Cherenkov radiation is the exotic electromagnetic radiation that is emitted in the opposite direction of moving charged particles in a left-handed material. Reversed Cherenkov radiation has not previously been observed, mainly due to the absence of both suitable all-metal left-handed materials for beam transport and suitable couplers for extracting the reversed Cherenkov radiation signal. In this paper, we develop an all-metal metamaterial, consisting of a square waveguide loaded with complementary electric split ring resonators...
March 23, 2017: Nature Communications
https://www.readbyqxmd.com/read/28332426/comments-on-neuroprotective-effects-of-melatonin-and-omega-3-on-hippocampal-cells-prenatally-exposed-to-900%C3%A2-mhz-electromagnetic-fields
#14
Sar Mortazavi, Smj Mortazavi, Maryam Paknahad
No abstract text is available yet for this article.
March 23, 2017: International Journal of Radiation Biology
https://www.readbyqxmd.com/read/28332159/electromagnetically-tracked-personalized-templates-for-surgical-navigation
#15
Andrew W L Dickinson, Michelle L Zec, David R Pichora, Brian J Rasquinha, Randy E Ellis
PURPOSE: An electromagnetic (EM) surgical tracking system was developed for orthopedic navigation. The reportedly poor accuracy of point-based EM navigation was improved by using anatomical impressions, which were EM-tracked personalized templates. Lines, rather than points, were consistently used for calibration and error evaluation. METHODS: Technical accuracy was tested using models derived from CT scans of ten cadaver shoulders. Tracked impressions were first designed, calibrated, and tested using lines as fiducial objects...
March 22, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28332158/first-clinical-use-of-the-echotrack-guidance-approach-for-radiofrequency-ablation-of-thyroid-gland-nodules
#16
Alfred Michael Franz, Alexander Seitel, Nasrin Bopp, Christian Erbelding, Dominique Cheray, Stefan Delorme, Frank Grünwald, Hüdayi Korkusuz, Lena Maier-Hein
PURPOSE: Percutaneous radiofrequency ablation (RFA) of thyroid nodules is an alternative to surgical resection that offers the benefits of minimal scars for the patient, lower complication rates, and shorter treatment times. Ultrasound (US) is the preferred modality for guiding these procedures. The needle is usually kept within the US scanning plane to ensure needle visibility. However, this restricts flexibility in both transducer and needle movement and renders the procedure difficult, especially for inexperienced users...
March 22, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28332042/the-effect-of-wi-fi-electromagnetic-waves-in-unimodal-and-multimodal-object-recognition-tasks-in-male-rats
#17
Amin Hassanshahi, Seyed Ali Shafeie, Iman Fatemi, Elham Hassanshahi, Mohammad Allahtavakoli, Mohammad Shabani, Ali Roohbakhsh, Ali Shamsizadeh
Wireless internet (Wi-Fi) electromagnetic waves (2.45 GHz) have widespread usage almost everywhere, especially in our homes. Considering the recent reports about some hazardous effects of Wi-Fi signals on the nervous system, this study aimed to investigate the effect of 2.4 GHz Wi-Fi radiation on multisensory integration in rats. This experimental study was done on 80 male Wistar rats that were allocated into exposure and sham groups. Wi-Fi exposure to 2.4 GHz microwaves [in Service Set Identifier mode (23...
March 22, 2017: Neurological Sciences
https://www.readbyqxmd.com/read/28331912/effect-of-visible-range-electromagnetic-radiations-on-escherichia-coli
#18
Samina T Yousuf Azeemi, Saleem Farooq Shaukat, Khawaja Shamsuddin Azeemi, Idrees Khan, Khalid Mahmood, Farah Naz
BACKGROUND: Escherichia coli is the agent responsible for a range of clinical diseases. With emerging antimicrobial resistance, other treatment options including solar/photo-therapy are becoming increasingly common. Visible Range Radiation Therapy/Colour Therapy is an emerging technique in the field of energy/vibrational medicine that uses visible spectrum of Electromagnetic Radiations to cure different diseases. In this study, our goal was to understand the effect of Visible Range Electromagnetic Radiations on E...
2017: African Journal of Traditional, Complementary, and Alternative Medicines: AJTCAM
https://www.readbyqxmd.com/read/28331888/new-concept-on-an-integrated-interior-magnetic-resonance-imaging-and-medical-linear-accelerator-system-for-radiation-therapy
#19
Xun Jia, Zhen Tian, Yan Xi, Steve B Jiang, Ge Wang
Image guidance plays a critical role in radiotherapy. Currently, cone-beam computed tomography (CBCT) is routinely used in clinics for this purpose. While this modality can provide an attenuation image for therapeutic planning, low soft-tissue contrast affects the delineation of anatomical and pathological features. Efforts have recently been devoted to several MRI linear accelerator (LINAC) projects that lead to the successful combination of a full diagnostic MRI scanner with a radiotherapy machine. We present a new concept for the development of the MRI-LINAC system...
January 2017: Journal of Medical Imaging
https://www.readbyqxmd.com/read/28331778/identification-of-scintillation-signatures-on-gps-signals-originating-from-plasma-structures-detected-with-eiscat-incoherent-scatter-radar-along-the-same-line-of-sight
#20
Biagio Forte, Chris Coleman, Susan Skone, Ingemar Häggström, Cathryn Mitchell, Federico Da Dalt, Tommaso Panicciari, Joe Kinrade, Gary Bust
Ionospheric scintillation originates from the scattering of electromagnetic waves through spatial gradients in the plasma density distribution, drifting across a given propagation direction. Ionospheric scintillation represents a disruptive manifestation of adverse space weather conditions through degradation of the reliability and continuity of satellite telecommunication and navigation systems and services (e.g., European Geostationary Navigation Overlay Service, EGNOS). The purpose of the experiment presented here was to determine the contribution of auroral ionization structures to GPS scintillation...
January 2017: Journal of Geophysical Research. Space Physics
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